sea jump 5PCS 3.7V 300mAh 25C li Battery+5in1 Charger for Syma X11 X11C WLToys V911S A120 XK A150 V966 FX801 UDI U830 U816A Hubsan X4 H107L DFD F180W F180C HS170 HS170C HS177 Parts Li Battery

Looked everywhere for replacement batteries that didn't suck for my kids Christmas presents! These fit perfectly and last a long time. Best part is they come with 5 of them and a charger that can charge them all at once so the kids don't get bored waiting for one at a time to charge. Lasting about 20-30 minutes per battery so far.Direct replacement for these rc cars:https://www.amazon.com/gp/aw/d/B09DPSY3PS?psc=1&ref=ppx_pop_mob_b_asin_title

The black charging box that you need to use to charge all 5 batteries doesn't work. Plugged them in and none of the lights indicating its charging won't stay on and flashes like there is a faulty wiring connection. So once these are all dead I will now have to buy another charger so that I can reuse them.

The wire is 4 cm from the edge of the battery to the end of the connector. The batteries that came with the S39 helicopter are 3 inches (about 7.7 cm). Fortunately I had some spare cables with the spade connectors and was able to make an extension cord.The batteries came in a plastic bag inside a small box. After arriving, I charged all five batteries. It is nice being able to charge five at once. I gave the battery life five stars because they lasted a reasonable amount of time. The helicopter flew for nearly as long as when using the stock batteries that came with it.I gave an overall three out of five stars because, even though it was advertised to work for the S39, you have to be prepared to make some modifications to get them to work. For uses where a 4 cm wire is enough, these batteries would be fine.

Just received this today, and the length of connector on the battery is not long enough to reach the connector on the helicopter once the battery has been installed. See pics. Also, even if I connect the battery and let it hang loose on the helicopter, the lights on it start blinking really fast and it’s unable to pair with the controller. So even though this is a 300 mah 3.7v battery (which is the same as the oem batteries I use) these batteries are being rejected by my S39. This was a complete waste of money, and the seller needs to rewrite the description since it does not work with the S39 RC Helicopter.

I put 2 of these into my Sphero 2.0. They hold a charge really well and it seems like the Sphero lasts way longer even when it was new.The charger is super nice because you can charge all 5 batteries at the same time.I wired 2 batteries in parallel for a RC car, but didn't isolate the wires properly. After short circuiting for about 5 minutes, nothing exploded or caught on fire. 0/10 would not recommend trying DIY 2 batteries together, but 10/10 would recommend these batteries for being so forgiving.

Bought these for my RC planes and they are great fit perfectly also love the charger great addition

The product works great. Used on a toy.

These batteries seemed fine. I charged them before I realized that they are too short to work at all. You can not get them to work! I tried every way imaginable to make them work. I even thought about adding some wire and splicing it. but since it's a battery I'm not sure that would be safe while recharging them. I'm sending them back !!!!😤🤭🤷🏻‍♂️😠😡😡